if(typeof(PROJECT) == 'undefined') PROJECT={}

PROJECT.Gears = {
    appName: 'Django-AltConf',
    appLogo: '/images/logo.gif',
    appManifest = '/gears-manifest/',
    L10N : {
        updateCompleted: "更新完成。",
        error: "错误："
    }
	createStore : function() {
		if ( 'undefined' == typeof google || ! google.gears ) return;

		if ( 'undefined' == typeof localServer )
			localServer = google.gears.factory.create("beta.localserver");

		store = localServer.createManagedStore(this.storeName());
		store.manifestUrl = PROJECT.Gears.appManifest;
		store.checkForUpdate();
		this.message();
	},

	getPermission : function() {
		if ( 'undefined' != typeof google && google.gears ) {
			if ( ! google.gears.factory.hasPermission )
				google.gears.factory.getPermission( PROJECT.Gears.appName, PROJECT.Gears.appLogo );

			try {
				this.createStore();
			} catch(e) {} // silence if canceled
		}
	},

	storeName : function() {
      var name = window.location.protocol + window.location.host;

      name = name.replace(/[\/\\:*"?<>|;,]+/g, '_'); // gears beta doesn't allow certain chars in the store name
	  name = 'sis_' + name.substring(0, 60); // max length of name is 64 chars

      return name;
    },

    message : function(show) {
		var t = this, msg1 = t.I('gears-msg1'), msg2 = t.I('gears-msg2'), msg3 = t.I('gears-msg3'), num = t.I('gears-upd-number'), wait = t.I('gears-wait');

		if ( ! msg1 ) return;

		if ( 'undefined' != typeof google && google.gears ) {
			if ( google.gears.factory.hasPermission ) {
				msg1.style.display = msg2.style.display = 'none';
				msg3.style.display = 'block';

				if ( 'undefined' == typeof store )
					t.createStore();

				store.oncomplete = function(){wait.innerHTML = (' ' + PROJECT.Gears.L10N.updateCompleted);};
				store.onerror = function(){wait.innerHTML = (' ' + PROJECT.Gears.L10N.error + ' ' + store.lastErrorMessage);};
				store.onprogress = function(e){if(num) num.innerHTML = (' ' + e.filesComplete + ' / ' + e.filesTotal);};
			} else {
				msg1.style.display = msg3.style.display = 'none';
				msg2.style.display = 'block';
			}
		}

		if ( show ) t.I('gears-info-box').style.display = 'block';
	},

	I : function(id) {
		return document.getElementById(id);
	}
}

function gearsInit() {
	if ( 'undefined' != typeof google && google.gears ) return;

	var gf = false;
	if ( 'undefined' != typeof GearsFactory ) { // Firefox
		gf = new GearsFactory();
	} else { // IE
		try {
			gf = new ActiveXObject('Gears.Factory');
		} catch (e) {}
	}

	if ( ! gf ) return;
	if ( 'undefined' == typeof google ) google = {};
	if ( ! google.gears ) google.gears = { factory : gf };
}

gearsInit();
